Battery tray, battery pack, and vehicle

Abstract

The application relates to the technical field of battery device, and provides a battery tray, a battery pack and a vehicle. The battery tray comprises a magnesium alloy bottom plate, an aluminum alloy frame and a glass fiber composite beam; the aluminum alloy frame is installed on the top side of the magnesium alloy bottom plate; the aluminum alloy frame comprises oppositely arranged first beams and oppositely arranged second beams, the first beams and the second beams surround to form a containing space, the glass fiber composite beam is arranged in the containing space, and the two ends of the glass fiber composite beam are connected to one first beam respectively, so that the containing space is divided into multiple hollow structures by the glass fiber composite beam, and the hollow structures and the magnesium alloy bottom plate surround to form a battery compartment for placing batteries. Through the cooperation of the magnesium alloy bottom plate, the aluminum alloy frame and the glass fiber composite beam, the structural strength of the battery tray is ensured, the weight of the battery tray is reduced, the light weight of the vehicle is facilitated, the energy consumption of the vehicle is reduced, and the endurance of the vehicle is improved.

Description

Technical Field

[0001] This application relates to the field of battery device technology, and more particularly to a battery tray, battery pack, and vehicle. Background Technology

[0002] In the field of new energy vehicles, battery trays, as key structural components supporting power battery packs, need to have high structural strength to withstand collision impacts. Currently, the industry generally uses aluminum alloy to manufacture tray frames through extrusion molding and welding processes. An aluminum base plate is installed on the bottom side of the frame, and aluminum alloy reinforcing beams are welded inside the tray frame to form the battery tray. The aluminum base plate, aluminum alloy frame, and aluminum alloy reinforcing beams, all with good mechanical properties, work together to give the battery tray high structural strength, enabling it to withstand the impact force of a collision and protect the battery modules.

[0003] Although aluminum alloys have a lower density than traditional steel, their density is still approximately 2.7 g / cm³. 3 The large size of the various components of the battery tray requires the use of a lot of aluminum alloy, which makes the weight of the aluminum alloy battery tray still relatively large, affecting the vehicle's lightweight design. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a battery tray, a battery pack, and a vehicle.

[0005] This application provides a battery tray, including a magnesium alloy base plate, an aluminum alloy frame, and a glass fiber composite beam;

[0006] The aluminum alloy frame is mounted on the top side of the magnesium alloy base plate;

[0007] The aluminum alloy frame includes a first beam and a second beam arranged opposite to each other, which enclose a receiving space. The glass fiber composite beam is disposed inside the receiving space, and each end of the glass fiber composite beam is connected to one of the first beams, so that the receiving space is divided into multiple hollow structures by the glass fiber composite beam. The hollow structures and the magnesium alloy base plate enclose a battery compartment for placing batteries.

[0008] Optionally, the magnesium alloy base plate includes a first magnesium alloy plate and a second magnesium alloy plate. The first magnesium alloy plate is hollow inside, and the second magnesium alloy plate is a solid plate. The opposite two sides of the first magnesium alloy plate form mounting notches, and the second magnesium alloy plate is installed in the mounting notches.

[0009] Optionally, the first magnesium alloy plate includes a plurality of internally hollow and parallel-connected magnesium alloy extruded plates, wherein the length of a portion of the magnesium alloy extruded plates is less than the length of the remaining magnesium alloy extruded plates, so that the mounting notch is formed between the portion of the magnesium alloy extruded plates and the remaining magnesium alloy extruded plates.

[0010] Optionally, the mounting notch is located in the middle of the first magnesium alloy plate.

[0011] Optionally, the aluminum alloy frame is provided with a plurality of fiberglass panels inside, the fiberglass panels are installed on the inner side wall of the first beam, and the fiberglass panels are disposed on the side of the fiberglass composite beam.

[0012] Optionally, the number of glass fiber composite beams is multiple, and the multiple glass fiber composite beams are arranged at intervals.

[0013] Optionally, the aluminum alloy frame includes a front beam, which is disposed outside the first beam and forms an assembly space with the first beam, and a magnesium alloy electrical compartment is installed in the assembly space.

[0014] Optionally, a cold plate is provided between the aluminum alloy frame and the magnesium alloy base plate, and a flow channel for coolant to flow is formed inside the cold plate.

[0015] A second aspect of this application provides a battery pack including a battery and a battery tray as described in any of the preceding claims, wherein the battery is mounted within the battery compartment.

[0016] A third aspect of this application provides a vehicle including the battery pack described above.

[0017] The technical solution provided in this application has the following advantages compared with the prior art:

[0018] This application provides a battery tray, battery pack, and vehicle. The battery tray uses an aluminum alloy frame as the primary structural component to bear collision impact forces. A lightweight and high-strength fiberglass composite beam serves as a reinforcing structure within the aluminum alloy frame. A magnesium alloy base plate supports the batteries within the battery compartment. The magnesium alloy base plate, aluminum alloy frame, and fiberglass composite beam work together to define the battery compartment for housing the batteries. Magnesium alloy has a lower density than aluminum alloy, resulting in a lighter magnesium alloy base plate compared to the base plate of a traditional aluminum alloy tray. Similarly, the fiberglass used in the fiberglass composite beam has a lower density than traditional aluminum alloy, making the fiberglass composite beam lighter than traditional aluminum alloy reinforcing beams, thus reducing the overall weight of the battery tray. Through the coordinated use of the magnesium alloy base plate, aluminum alloy frame, and fiberglass composite beam, the weight of the battery tray is reduced while ensuring its structural strength meets vehicle collision safety requirements. This contributes to vehicle lightweighting, reduces vehicle energy consumption, and increases vehicle range. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the battery tray structure described in an embodiment of this application;

[0022] Figure 2 This is an exploded view of the battery tray described in an embodiment of this application.

[0023] Among them, 1. Magnesium alloy base plate; 11. First magnesium alloy plate; 12. Second magnesium alloy plate; 2. Aluminum alloy frame; 21. First beam; 22. Second beam; 23. Battery compartment; 24. Fiberglass board; 25. Front beam; 3. Fiberglass composite beam; 4. Cold plate; 5. Magnesium alloy electrical compartment. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0026] Reference Figure 1 and Figure 2 As shown, the first aspect of this application provides a battery tray, including a magnesium alloy base plate 1, an aluminum alloy frame 2, and a glass fiber composite beam 3; the aluminum alloy frame 2 is installed on the top side of the magnesium alloy base plate 1; the aluminum alloy frame 2 includes a first beam 21 and a second beam 22 arranged opposite to each other, the first beam 21 and the second beam 22 enclosing a receiving space, the glass fiber composite beam 3 is disposed inside the receiving space, and each end of the glass fiber composite beam 3 is connected to a first beam 21, so that the receiving space is divided into multiple hollow structures by the glass fiber composite beam 3, and the hollow structures and the magnesium alloy base plate 1 enclose a battery compartment 23 for placing batteries.

[0027] Specifically, the magnesium alloy base plate 1 is made of magnesium alloy sheet, and its surface is anodized to improve corrosion resistance. The magnesium alloy base plate 1 has a rectangular flat plate structure with bolt mounting holes on the edges, allowing the aluminum alloy frame 2 to be fixedly connected to the magnesium alloy base plate 1 with bolts. The bottom side of the magnesium alloy base plate 1 can be made of a hot-pressed nano-silicon-based material sheet to enhance its impact resistance.

[0028] The first beam 21 and the second beam 22 mentioned above can both be straight beams, such as... Figure 1 and Figure 2 As shown, the first direction x and the second direction y are perpendicular to each other. Two first beams 21 are arranged opposite each other along the first direction x, and two second beams 22 are arranged opposite each other along the second direction y. The ends of the first beams 21 along the second direction y and the ends of the second beams 22 along the first direction x are connected to each other, so that the first beams 21 and the second beams 22 are connected to each other to form a closed rectangular frame structure.

[0029] The aforementioned glass fiber composite beam 3 can be made of continuous glass fiber reinforced epoxy resin composite material, manufactured into a straight beam structure through a pultrusion molding process. The cross-section of the glass fiber composite beam 3 can be rectangular, and the surface of the glass fiber composite beam 3 has anti-slip textures. Alternatively, when two first beams 21 are arranged opposite each other along the first direction x, the glass fiber composite beam 3 extends along the first direction x, and a fixing groove is formed on one side of the two first beams 21. Both ends of the glass fiber composite beam 3 are inserted into the two fixing grooves and fixed with structural adhesive, thus fixing both ends of the glass fiber composite beam 3 to the two first beams 21. Alternatively, the glass fiber composite beam 3 can have fixing holes at both ends, and screw holes on the two first beams 21. The two ends of the glass fiber composite beam 3 abut against the two first beams 21, and bolts are passed through the fixing holes and connected to the screw holes, so that the ends of the glass fiber composite beam 3 are connected to the aluminum alloy frame 2.

[0030] The aluminum alloy frame 2 can be equipped with one glass fiber composite beam 3, which divides the accommodating space inside the aluminum alloy frame 2 into two battery compartments 23. Alternatively, two glass fiber composite beams 3 can be selected, which divide the accommodating space inside the aluminum alloy frame 2 into three battery compartments 23.

[0031] During a vehicle collision, the battery tray needs to withstand the deformation caused by the impact force within a certain range to prevent the battery tray from squeezing the battery module and causing the battery module to rupture and catch fire. This means that the battery tray needs to have a certain structural strength. In the existing technology, aluminum alloys with high tensile strength, yield strength and elastic modulus are usually used to make battery trays. However, aluminum alloys still have a high density, and battery trays made of aluminum alloys are still relatively heavy.

[0032] Magnesium alloys have a lower density than aluminum alloys, but aluminum alloys have higher tensile strength, yield strength, and elastic modulus than magnesium alloys. Furthermore, magnesium alloys have a lower fatigue limit and are more sensitive to surface defects. If the entire battery tray were made of magnesium alloy, the structural strength of a battery tray of the same size would be reduced, making it difficult to guarantee the safety of the battery tray. Magnesium alloys are also relatively reactive and difficult to weld, requiring a one-piece molding process for the tray frame, which is costly. During a vehicle collision, the main structural component bearing the impact force is the battery tray frame, and since the frame structure accounts for a relatively small volume, changes in its weight have a minimal impact on the overall weight of the battery tray. Therefore, this application still uses an aluminum alloy frame 2 as the battery tray frame.

[0033] The base plate of the battery tray has a large area and a simple shape, requiring a lot of material to manufacture. In traditional aluminum alloy battery trays, the weight of the base plate accounts for a large proportion of the overall weight of the battery tray. Reducing the weight of the base plate can significantly reduce the overall weight of the battery tray. In this application, a magnesium alloy base plate 1 is used, which can effectively reduce the weight of the base plate. Moreover, the base plate has a simple plate structure, which allows the magnesium alloy base plate 1 to be manufactured into a base plate that meets the shape requirements through simple cutting and processing, thereby reducing the processing cost of magnesium alloy.

[0034] The reinforcing beam structure in the battery tray distributes the impact force during a vehicle collision, and the impact force borne by the battery tray is applied to the reinforcing beam along its extension direction. The glass fiber composite beam 3 used in this application can be formed by arranging glass fibers. The density of glass fibers is less than that of aluminum alloy, and the tensile strength of glass fibers in their extension direction is close to that of aluminum alloy. This allows the glass fiber composite beam 3 to bear the force transmitted to the glass fiber composite beam 3 through the aluminum alloy frame 2 during a vehicle collision, while its own weight is lower than that of the aluminum alloy reinforcing beam. This satisfies the requirement of increasing the structural strength of the battery tray while reducing the weight of the battery tray.

[0035] The battery tray provided in this embodiment uses an aluminum alloy frame 2 as the main structural component to bear the impact force of a collision. A lightweight and high-strength glass fiber composite beam 3 serves as a reinforcing structure within the aluminum alloy frame 2. A magnesium alloy base plate 1 supports the batteries within the battery compartment 23. The magnesium alloy base plate 1, aluminum alloy frame 2, and glass fiber composite beam 3 work together to define the battery compartment 23 for placing the batteries. The density of magnesium alloy is lower than that of aluminum alloy, making the weight of the magnesium alloy base plate 1 lower than that of a traditional aluminum alloy tray base plate. Similarly, the density of the glass fiber used in the glass fiber composite beam 3 is lower than that of traditional aluminum alloy, making the weight of the glass fiber composite beam 3 lower than that of a traditional aluminum alloy reinforcing beam. This overall reduces the weight of the battery tray. Through the cooperation of the magnesium alloy base plate 1, aluminum alloy frame 2, and glass fiber composite beam 3, the weight of the battery tray is reduced while ensuring that its structural strength meets the safety requirements for vehicle collisions. This contributes to vehicle lightweighting, reduces vehicle energy consumption, and improves vehicle range.

[0036] In specific use, the battery tray provided in this application embodiment involves installing the fiberglass composite beam 3 inside the aluminum alloy frame 2, fixing the aluminum alloy frame 2 to the magnesium alloy base plate 1, installing the battery in the battery compartment 23, and connecting the aluminum alloy frame 2 to the vehicle body frame to install the battery tray on the vehicle.

[0037] Reference Figure 1 and Figure 2 As shown, in some embodiments, the magnesium alloy base plate 1 includes a first magnesium alloy plate 11 and a second magnesium alloy plate 12. The first magnesium alloy plate 11 is hollow inside, and the second magnesium alloy plate 12 is a solid plate. The opposite two sides of the first magnesium alloy plate 11 form mounting notches, and the second magnesium alloy plate 12 is installed in the mounting notches.

[0038] This design allows the solid second magnesium alloy plate 12 to increase the yield strength at the edge of the first magnesium alloy plate 11, reducing the deformation of the magnesium alloy base plate 1 during a side impact with a vehicle. The separate design of the first magnesium alloy plate 11 and the second magnesium alloy plate 12 achieves localized reinforcement, avoiding the increase in weight caused by using a solid plate for the entire magnesium alloy base plate 1. The mounting notch can locate the installation position of the second magnesium alloy plate 12, and the multiple inner walls of the mounting notch can fit against the second magnesium alloy plate 12, increasing the contact area between the second magnesium alloy plate 12 and the first magnesium alloy plate 11.

[0039] Specifically, the first magnesium alloy plate 11 can be a profile plate made of magnesium alloy by hot extrusion forming, and the cross-section of the profile plate has a honeycomb hollow structure. The second magnesium alloy plate 12 can be made of magnesium alloy by isothermal forging, and the second magnesium alloy plate 12 is a solid plate.

[0040] The first magnesium alloy plate 11 has recesses on its two opposite edges along the second direction y to form mounting notches. A slot can be provided on the inner wall of the mounting notch. The edge of the second magnesium alloy plate 12 has protrusions that match the shape of the slots. The protrusions are inserted into the slots to connect the second magnesium alloy plate 12 to the first magnesium alloy plate 11. Alternatively, bolts can be used to connect the second magnesium alloy plate 12 and the first magnesium alloy plate 11.

[0041] The first magnesium alloy plate 11 is located at the pillar on the side of the vehicle along the second direction y. When the vehicle is involved in a side collision, the first magnesium alloy plate 11 bears the impact along the two sides of the second direction y. The first magnesium alloy plate 11 is hollow inside and is easily deformed when it is subjected to a collision. The use of a solid second magnesium alloy plate 12 on both sides of the first magnesium alloy plate 11 along the second direction y can improve the strength of the edge of the first magnesium alloy plate 11.

[0042] The first magnesium alloy plate 11 is machined with mounting notches on both sides along the second direction y. The size of the mounting notches matches the size of the second magnesium alloy plate 12. After the second magnesium alloy plate 12 is fixedly installed in the mounting notches, the side edge of the second magnesium alloy plate 12 facing away from the first magnesium alloy plate 11 in the second direction y is flush with the edge of the first magnesium alloy plate 11 along the second direction y.

[0043] Reference Figure 1 and Figure 2 As shown, in some embodiments, the first magnesium alloy plate 11 includes a plurality of internally hollow and parallel-connected magnesium alloy extruded plates, wherein the length of a portion of the magnesium alloy extruded plates is less than the length of the remaining magnesium alloy extruded plates, so as to form an installation gap between the portion of the magnesium alloy extruded plates and the remaining magnesium alloy extruded plates.

[0044] With this setup, the size of the magnesium alloy base plate 1 can be adjusted by increasing or decreasing the number of magnesium alloy extruded plates, thus allowing for convenient adjustment of the size of the magnesium alloy base plate 1 to suit different vehicle models.

[0045] Specifically, the first direction x can be selected as the length direction of the vehicle body, and the second direction y can be selected as the width direction of the vehicle body. Multiple magnesium alloy extruded sheets are arranged along the first direction x, and each magnesium alloy extruded sheet extends along the second direction y. Each magnesium alloy extruded sheet is a rectangular sheet, and adjacent magnesium alloy extruded sheets can be riveted or bolted together. The magnesium alloy extruded sheet is a profile sheet made by hot extrusion molding of magnesium alloy, and the interior of the hot-extruded magnesium alloy extruded sheet has hollow channels.

[0046] The aforementioned plurality of magnesium alloy extruded plates may include a first plate group and a second plate group. The length of the magnesium alloy extruded plate in the first plate group is greater than the length of the magnesium alloy extruded plate in the second plate group. The plurality of magnesium alloy extruded plates in the second plate group are arranged adjacent to each other along the second direction y. The plurality of magnesium alloy extruded plates in the first plate group are arranged on both sides of the second plate group along the first direction x. The edge of the second plate group along the second direction y and the edge of the first plate group along the first direction x are spaced apart in the second direction y, so that the first plate group and the second plate group cooperate with each other to form an installation notch.

[0047] Reference Figure 1 and Figure 2 As shown, in some embodiments, the mounting notch is located in the middle of the first magnesium alloy plate 11.

[0048] With this configuration, the solid second magnesium alloy plate 12 is positioned in the middle of the first magnesium alloy plate 11, which can adjust the position of the center of gravity of the magnesium alloy base plate 1, so that the center of gravity of the magnesium alloy base plate 1 is close to the center of the magnesium alloy base plate 1 along the first direction x, reducing the center of gravity offset and facilitating the movement of the magnesium alloy base plate 1.

[0049] Specifically, a defined area around the midpoint of the first magnesium alloy plate 11 along the first direction x can be selected as the reinforcement area. The defined area can be selected as 1 / 5 to 1 / 4 of the size of the first magnesium alloy plate 11 along the first direction x. The mounting notch is formed in the reinforcement area, and the second magnesium alloy plate 12 is installed in the reinforcement area.

[0050] The aforementioned battery tray is installed on the vehicle floor. The middle part of the first magnesium alloy plate 11 corresponds to the position of the B-pillar of the vehicle body, so that the second magnesium alloy plate 12 is set at the B-pillar of the vehicle body, thereby increasing the strength of the middle part of the magnesium alloy floor 1 to share the impact on the B-pillar.

[0051] Reference Figure 1 and Figure 2 As shown, in some embodiments, the aluminum alloy frame 2 has multiple fiberglass panels 24 inside, the fiberglass panels 24 are installed on the inner side wall of the first beam 21, and the fiberglass panels 24 are disposed on the side of the fiberglass composite beam 3.

[0052] With this configuration, the fiberglass board 24 serves as a buffer structure within the battery compartment 23. The fiberglass board 24 separates the battery within the battery compartment 23 from the aluminum alloy frame 2. When the aluminum alloy frame 2 deforms, the fiberglass board 24 acts as a buffer and can prevent the deformed aluminum alloy frame 2 from puncturing the battery.

[0053] Specifically, the fiberglass board 24 can be made of chopped fiberglass composite to form a rectangular board; the fiberglass composite beam 3 can be extended along the first direction x, and the fiberglass board 24 is set on one side of the fiberglass composite beam 3 along the second direction y. The fiberglass board 24 extends along the second direction y so that the fiberglass board 24 is set on the opposite sidewalls of the two first beams 21. When the battery is placed in the battery compartment 23, it abuts against the fiberglass board 24 to avoid the battery directly contacting the aluminum alloy frame 2.

[0054] The inner wall of the first beam 21 is provided with multiple fiberglass boards 24, so that fiberglass boards 24 are respectively provided on both sides of the fiberglass composite beam 3 along the second direction y, so that each hollow structure is provided with fiberglass boards 24, thereby providing fiberglass boards 24 on both opposite inner walls of the battery compartment 23 along the first direction x; when the battery is in the battery compartment 23, both ends of the battery along the first direction x can respectively abut against the fiberglass boards 24. The edges of the fiberglass boards 24 can be spaced apart from the fiberglass composite beam 3, or the edges of the fiberglass boards 24 can be attached to the fiberglass composite beam 3.

[0055] Fiberglass panels 24 are installed on the two opposite side walls of the two first beams 21 along the first direction x. When the vehicle is moving, the battery will move along the first direction x under the action of inertia. The two fiberglass panels 24 can form a buffer on both sides of the battery along the first direction x, reducing the force on the battery and the aluminum alloy frame 2 when they collide.

[0056] Reference Figure 1 and Figure 2 As shown, in some embodiments, there are multiple glass fiber composite beams 3, which are spaced apart.

[0057] With this configuration, multiple fiberglass composite beams 3 divide the internal space of the aluminum alloy frame 2, and multiple battery compartments 23 can hold battery cell packs, so that the battery tray can be adapted to batteries with different numbers of battery cell packs.

[0058] Specifically, the number of glass fiber composite beams 3 can be selected as two, with the two glass fiber composite beams 3 spaced apart along the second direction y, so that the interior of the aluminum alloy frame 2 is divided to form three battery compartments 23; or the number of glass fiber composite beams 3 can be selected as four, with the four glass fiber composite beams 3 spaced apart along the second direction y, so that the interior of the aluminum alloy frame 2 forms five battery compartments 23.

[0059] Reference Figure 1 and Figure 2 As shown, in some embodiments, the aluminum alloy frame 2 includes a front beam 25, which is disposed outside the first beam 21 and forms an assembly space with the first beam 21. A magnesium alloy electrical compartment 5 is installed in the assembly space.

[0060] Specifically, the two ends of the front beam 25 are connected to the first beam 21 to form an assembly space. The first beam 21 and the second beam 22 are connected to each other to form a closed rectangular frame structure. The front beam 25 and the first beam 21 can be connected to each other by welding. The front beam 25 is a curved beam. After the two ends of the front beam 25 are connected to the first beam 21, the front beam 25 and the first beam 21 form an assembly space; or, connecting beams are provided at both ends of the front beam 25. Both connecting beams are inclined relative to the front beam 25 towards the first beam 21, so that after the connecting beams at both ends of the front beam 25 are connected to the first beam 21, the front beam 25, the two connecting beams, and the first beam 21 form an assembly space.

[0061] Two first beams 21 can be selected and arranged opposite each other along the first direction x. The front beam 25 is connected to one side of one first beam 21 facing away from the other first beam 21 along the first direction x. The assembly space and the accommodating space are arranged along the first direction x.

[0062] The aforementioned magnesium alloy electrical compartment 5 can be a box structure made of cast magnesium alloy. The magnesium alloy electrical compartment 5 is used to install electrical control structures such as conductive wires, control wires, and controllers. Threaded holes can be provided on the first beam 21 and the front beam 25 corresponding to the assembly space, allowing the magnesium alloy electrical compartment 5 to be connected to the first beam 21 and the front beam 25 by bolts.

[0063] Reference Figure 1 and Figure 2 As shown, in some embodiments, a cold plate 4 is provided between the aluminum alloy frame 2 and the magnesium alloy base plate 1, and a flow channel for coolant to flow is formed inside the cold plate 4.

[0064] With this configuration, the heat generated by the battery during operation is transferred to the cold plate 4, and the coolant flows in the flow channel through the inlet and outlet, allowing the coolant to exchange heat with the cold plate 4 and continuously dissipate heat from the battery.

[0065] Specifically, the cold plate 4 can be made of aluminum alloy, and the interior of the plate can be formed with continuous channels as flow channels. The flow channels have inlets and outlets at the edges of the cold plate 4. The coolant enters the flow channel through the inlet and flows out of the flow channel through the outlet.

[0066] The two ends of the flow channel inside the cold plate 4 form an inlet and an outlet on the edge of the cold plate 4, respectively. The coolant enters the flow channel through the inlet and then flows out of the flow channel through the outlet. The inlet and outlet can be formed on the same side edge of the cold plate 4, or they can be formed on adjacent or opposite sides of the cold plate 4.

[0067] When the battery in the battery compartment 23 is working, it generates heat. The heat generated by the battery is transferred to the cold plate 4. When the coolant flows in the channel, it can exchange heat with the cold plate 4, thereby continuously cooling the battery in the battery compartment 23.

[0068] A second aspect of this application provides a battery pack including a battery and a battery tray as described above.

[0069] The battery is installed in the battery compartment 23, so that the battery and the battery tray are packaged to form an independent battery pack. During vehicle manufacturing, the battery pack is installed on the vehicle body.

[0070] The magnesium alloy base plate 1 and glass fiber composite beam 3 in the battery tray mentioned above reduce the weight of the battery tray and make the battery pack lighter.

[0071] A third aspect of this application provides a vehicle including the battery pack described above.

[0072] Specifically, the outer side of the aluminum alloy frame 2 is provided with mounting points, which are connected to the bottom side of the vehicle body, so that the battery pack is installed at the bottom of the vehicle and the battery is installed in the battery compartment 23 to supply power to the vehicle.

[0073] By installing the aforementioned battery pack in the vehicle, the magnesium alloy base plate 1 and the fiberglass composite beam 3 work together to reduce the weight of the battery tray, thus making the vehicle lighter.

[0074] In the specific use of the battery tray, battery pack, and vehicle provided in this application embodiment, multiple fiberglass composite beams 3 are installed inside the aluminum alloy frame 2. The aluminum alloy frame 2 is fixedly connected to the magnesium alloy base plate 1. The cold plate 4 is installed between the magnesium alloy base plate 1 and the aluminum alloy frame 2. The magnesium alloy electrical compartment 5 is installed in the assembly space. The battery is installed in the battery compartment 23. The aluminum alloy frame 2 is connected to the vehicle body to install the battery pack on the vehicle.

[0075] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0076] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery tray, characterized in that, It includes a magnesium alloy base plate (1), an aluminum alloy frame (2), and a glass fiber composite beam (3); The aluminum alloy frame (2) is installed on the top side of the magnesium alloy base plate (1); The aluminum alloy frame (2) includes a first beam (21) and a second beam (22) arranged opposite to each other. The first beam (21) and the second beam (22) enclose a receiving space. The glass fiber composite beam (3) is disposed inside the receiving space, and each end of the glass fiber composite beam (3) is connected to one of the first beams (21), so that the receiving space is divided into multiple hollow structures by the glass fiber composite beam (3). The hollow structures and the magnesium alloy base plate (1) enclose a battery compartment (23) for placing batteries.

2. The battery tray according to claim 1, characterized in that, The magnesium alloy base plate (1) includes a first magnesium alloy plate (11) and a second magnesium alloy plate (12). The first magnesium alloy plate (11) is hollow inside, and the second magnesium alloy plate (12) is a solid plate. The opposite two sides of the first magnesium alloy plate (11) form mounting notches, and the second magnesium alloy plate (12) is installed in the mounting notches.

3. The battery tray according to claim 2, characterized in that, The first magnesium alloy plate (11) includes a plurality of internally hollow and parallel-connected magnesium alloy extruded plates, wherein the length of a portion of the magnesium alloy extruded plates is less than the length of the remaining magnesium alloy extruded plates, so that the mounting notch is formed between the portion of the magnesium alloy extruded plates and the remaining magnesium alloy extruded plates.

4. The battery tray according to claim 2, characterized in that, The mounting notch is located in the middle of the first magnesium alloy plate (11).

5. The battery tray according to claim 1, characterized in that, The aluminum alloy frame (2) is provided with a plurality of glass fiber boards (24) inside. The glass fiber boards (24) are installed on the inner side wall of the first beam (21) and are located on the side of the glass fiber composite beam (3).

6. The battery tray according to claim 1, characterized in that, The number of glass fiber composite beams (3) is multiple, and the multiple glass fiber composite beams (3) are arranged at intervals.

7. The battery tray according to claim 1, characterized in that, The aluminum alloy frame (2) includes a front beam (25), which is located outside the first beam (21) and forms an assembly space with the first beam (21). A magnesium alloy electrical compartment (5) is installed in the assembly space.

8. The battery tray according to claim 1, characterized in that, A cold plate (4) is provided between the aluminum alloy frame (2) and the magnesium alloy base plate (1), and a flow channel for coolant to flow is formed inside the cold plate (4).

9. A battery pack, characterized in that, Includes a battery and a battery tray as described in any one of claims 1 to 7, wherein the battery is installed within the battery compartment (23).

10. A vehicle, characterized in that, Includes the battery pack as described in claim 9.

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